US4067773A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Enzyme-containing article for removing paper adhered to a surface
Assignee: William Zinsser and Co Inc
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Filing: 1975-09-02
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Granted: 1978-01-10
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Expires: 1995-09-02
Abstract
Abstract A two component article of manufacture useful for removing paper adhered to a surface with a starch-based adhesive comprising a sealed moisture-proof first package containing an enzyme composition comprising either a carbohydrase or a carbohydrase and a protease and a second package containing a liquid comprising (a) an activator for the enzyme composition, (b) a wetting agent and (c) a solvent for reducing the rate of evaporation of water from paper. Paper is removed from the surface by mixing the contents of the two packages with hot water, applying the aqueous composition to the paper and removing the paper after the enzyme composition has degraded the adhesive properties of the adhesive.
Inventors
- 👤 James W. Martin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 08:36
CPC Classifications
C; C09; C09D; C09D9/00; D; D21; D21H; D21H27/00; D21H27/18; D21H27/20
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
121 words
An article useful for removing paper adhered to a surface with a starch-based adhesive which comprises: A. a sealed moisture-proof first package containing an enzyme composition consisting essentially of a mixture of carbohydrase and a protease; and, B. a second package adapted for use in conjunction with said first package and containing a liquid comprising (a) a calcium salt as an activator for said enzyme composition, (b) a nonionic surfactant as a wetting agent, and (c) a solvent for reducing the rate of evaporation of water from paper, said solvent being selected from the group consisting of diethylene glycol monomethyl ether, dipropylene glycol monomethyl ether and mixtures thereof, said solvent and said wetting agent being essentially inert to said enzyme composition.
Claim 2
Dependent Claim
121 words
An article useful for removing paper adhered to a surface with a starch-based adhesive which comprises: A. a sealed moisture-proof first package containing an enzyme composition consisting essentially of a mixture of carbohydrase and a protease; and, B. a second package adapted for use in conjunction with said first package and containing a liquid comprising (a) a calcium salt as an activator for said enzyme composition, (b) a nonionic surfactant as a wetting agent, and (c) a solvent for reducing the rate of evaporation of water from paper, said solvent being selected from the group consisting of diethylene glycol monomethyl ether, dipropylene glycol monomethyl ether and mixtures thereof, said solvent and said wetting agent being essentially inert to said enzyme composition.
Claim 3
Dependent Claim
127 words
An article useful for removing paper adhered to a surface with a starch-based adhesive which comprises: A. a sealed moisture-proof first package containing an enzyme composition consisting essentially of a mixture of amylase and a bacteria alkaline protease of pH 9.0 activity; and B. a second package adapted for use in conjunction with said first package and containing a liquid comprising (a) a calcium salt as an activator for said enzyme composition, (b) an anionic surfactant as a wetting agent, and (c) a solvent for reducing the rate of evaporation of water from paper, said solvent being selected from the group consisting of diethylene glycol monomethyl ether, dipropylene glycol monomethyl ether, and mixtures thereof, said solvent and said wetting agent being essentially inert to said enzyme composition.
Claim 4
Dependent Claim
127 words
An article useful for removing paper adhered to a surface with a starch-based adhesive which comprises: A. a sealed moisture-proof first package containing an enzyme composition consisting essentially of a mixture of amylase and a bacteria alkaline protease of pH 9.0 activity; and B. a second package adapted for use in conjunction with said first package and containing a liquid comprising (a) a calcium salt as an activator for said enzyme composition, (b) an anionic surfactant as a wetting agent, and (c) a solvent for reducing the rate of evaporation of water from paper, said solvent being selected from the group consisting of diethylene glycol monomethyl ether, dipropylene glycol monomethyl ether, and mixtures thereof, said solvent and said wetting agent being essentially inert to said enzyme composition.
Claim 5
Dependent Claim
120 words
An article useful for removing paper adhered to a surface with a starch-based adhesive which comprises: A. a sealed moisture-proof first package containing an enzyme composition consisting essentailly of a mixture of amylase and pepsin; and B. a second package adapted for use in conjunction with said first package and containing a liquid comprising (a) a calcium salt as an activator for said enzyme composition, (b) a cationic surfactant as a wetting agent, and (c) a solvent for reducing the rate of evaporation of water from paper, said solvent being selected from the group consisting of diethylene glycol monomethyl ether, dipropylene glycol monomethyl ether, and mixtures thereof, said solvent and said wetting agent being essentially inert to said enzyme composition.
Claim 6
Dependent Claim
120 words
An article useful for removing paper adhered to a surface with a starch-based adhesive which comprises: A. a sealed moisture-proof first package containing an enzyme composition consisting essentailly of a mixture of amylase and pepsin; and B. a second package adapted for use in conjunction with said first package and containing a liquid comprising (a) a calcium salt as an activator for said enzyme composition, (b) a cationic surfactant as a wetting agent, and (c) a solvent for reducing the rate of evaporation of water from paper, said solvent being selected from the group consisting of diethylene glycol monomethyl ether, dipropylene glycol monomethyl ether, and mixtures thereof, said solvent and said wetting agent being essentially inert to said enzyme composition.
References Cited (Backward Citations)
US2607359A
Cited
US3413198A
Cited
US3506582A
Cited
US3709825A
Cited
US3627688A
Cited
US3629004A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1981-01-09 | 1981-07-11 | 1982-01-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-01-09 | 1985-07-11 | 1986-01-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-01-09 | 1989-07-11 | 1990-01-10 | $7700.00 | Window Closed / Lapsed |